15 August 1984 Transient Gain And Absorption Measurements In Electron Beam Pumped Helium And Helium/Halogen Mixtures
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Abstract
The temporal behaviour of gain and absorption coefficients for electron beam pumped gas mixtures containing helium, C12, CC14 and F2 are investigated. From the transient absorption in pure helium photoionization cross sections for He(23S) and He (a ,3 ) in the UV and VUV are determined. In He/C12 mixtures a strong absorption around 220 nm was observed that is ascribed to C12(A' )-Cl2(D') transitions. The small signal gain coefficient of the Cl2(D' -A' ) laser at 258 nm was increased con-siderably in magnitude and temporal duration by the addition of CC14 to a He/C12 gas mixture. The observed effects are explained by a very efficient electron quenching of the D. -state.
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R. Sauerbrey, H. Langhoff, J. Liegel, W. Walter, "Transient Gain And Absorption Measurements In Electron Beam Pumped Helium And Helium/Halogen Mixtures", Proc. SPIE 0476, Excimer Lasers: Their Applications & New Frontiers in Lasers, (15 August 1984); doi: 10.1117/12.942572; https://doi.org/10.1117/12.942572
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